A construction method of widening road base

Abstract

The invention discloses a splicing-widening construction method for a road base. The splicing-widening construction method comprises the following steps that 1, an earth shoulder of a width spliced road segment is in lap joint with an old road, a base construction area of the width spliced road segment is determined, and a base groove is dug in the construction area; 2, sundries in the base groove are cleaned, and watering is conducted to wet the base groove; 3, the base groove is paved with rubble, the paved rubble is rolled through a plurality of rolling devices, and the road surface of the compacted splicing-widened road segment is controlled to be higher than the surface of the old road; and finally, a seal coat is constructed at the lap joint of the splicing-widened road segment and the old road, and prime coat construction is conducted. According to the splicing-widening construction method for the road base, by controlling the road surface of the compacted splicing-widened road segment to be higher than the surface of the old road, certain settlement amount is reserved, and the problem that sedimentation occurs in the future due to insufficient compaction is solved; a two-side lapped rolling mode of a single steel wheel road roller and a rationalized construction sequence are adopted, and the compaction effect of the splicing-widened road segment is effectively improved; by constructing the seal coat at the lap joint of the width spliced road segment and the old road, the lap joint quality is improved.

Description

technical field [0001] The invention relates to the technical field of road construction, in particular to a construction method for widening road bases. Background technique [0002] At present, in highway subgrade reconstruction and expansion projects, due to cost considerations, it is not suitable for re-laying and compaction after overall excavation. At present, the commonly used schemes mainly include: double-sided widening, single-sided widening and separate roadbed. [0003] Among them, double-sided widening has the advantages of less land occupation, large traffic capacity, and cost savings. It has been fully applied in the reconstruction and expansion of expressways in plain micro-hilly areas and some mountainous areas. Due to the difference between the widened road section and the ordinary road section, because the widened road section is narrow, generally between 1-2.5m, and there is a problem of overlapping on both sides, if large-scale compaction equipment is us...

AI Technical Summary

Problems solved by technology

Due to the difference between the widened road section and the ordinary road section, because the widened road section is narrow, generally between 1-2.5m, and there is a problem of overlapping on both sides, if large-scale compaction equipment is used for rolling, the width of the widened road section is less than The width of the steel wheel is likely to cause poor compaction quality at the overlapping joints and non-compact joints; if small compaction equipment is used for rolling, it will be difficult to meet the overall compaction quality requirements of the road in the widening section

[0004] The paving and compacting construction methods for the widening section in the existing technology, due to lack of experience, the processing method is not in place, the compaction quality cannot meet the requirements, and the compaction degree can only reach 94%, which fails to reach the grassroots level. The compaction requirement of the design is 98%. Compared with the center of the widened road section and the vicinity of the overlapping position, the compaction is uneven, and the overall compaction quality is poor, resulting in potential safety hazards

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